Finding the Fourth Proportional to 19,111.63, 28,656.23 and 5,780.62

Step by Step Solution

1. Step 1: Write the proportion equation
   19,111.63 : 28,656.23 = 5,780.62 : x
2. Step 2: Convert to fraction form
   19,111.63/28,656.23 = 5,780.62/x
3. Step 3: Cross multiply
   19,111.63x = 28,656.23 × 5,780.62
4. Step 4: Simplify right side
   19,111.63x = 165,650,654.50
5. Step 5: Solve for x
   x = 165,650,654.50/19,111.63
6. Step 6: Final answer
   x = 8,667.53